Oso Flaco Site Air Monitoring Station, Nipomo, California

Oso Flaco Site is an air monitoring station located on Oso Flaco Lake Road in Nipomo, California, within San Luis Obispo County. The station is operated by the San Luis Obispo County Air Pollution Control District (APCD) and is part of the broader US EPA Air Quality System (AQS) monitoring network. It serves to track ambient air quality in the region, contributing to federal and state regulatory compliance. The station reports data to the AQS network, with the most recent sample date recorded as September 30, 2025. While specific parameters measured are not detailed, typical air monitoring stations in California's Central Coast region measure criteria pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, and sulfur dioxide, in line with National Ambient Air Quality Standards (NAAQS). The station's siting is representative of the local environment, which includes agricultural and coastal influences. Oso Flaco Site plays a key role in assessing air quality in San Luis Obispo County, an area with mixed urban and rural sources. The data supports public health advisories and regulatory actions by the APCD. Its location near Oso Flaco Lake provides valuable monitoring of coastal air quality, helping to understand pollutant transport and local emission impacts.

The Oso Flaco Site monitors air quality in a region characterized by coastal and agricultural influences. The station's data helps assess compliance with NAAQS for criteria pollutants, which is critical given the area's proximity to agricultural emissions and coastal meteorological patterns. Parameter coverage typically includes ozone and particulate matter, with siting designed to capture representative ambient conditions. Reporting continuity through the AQS network ensures long-term trend analysis for regulatory decision-making.